2 answers

1

Tolley is right, none of these are correct. If you mean the lands that belong to multiple colonies, then D would be the correct possessive form. However, other parts of the sentence would need to be corrected.

Most of the colonies' lands were full of trees.

If you are confused about how to make a noun possesive, feel free to ask a question. We enjoy helping people, but won't do your homework for you.